aek Posted August 16, 2022 Share Posted August 16, 2022 (edited) I came across about a dozen o f these. They measure <1mm. Middle Devonian, Cedar valley group Iowa. Any help appreciated. Edited August 16, 2022 by aek 1 Link to comment Share on other sites More sharing options...
Al Dente Posted August 16, 2022 Share Posted August 16, 2022 The squared base makes me think of Acanthodian scales. 4 Link to comment Share on other sites More sharing options...
aek Posted August 16, 2022 Author Share Posted August 16, 2022 @Al Dente thanks Link to comment Share on other sites More sharing options...
connorp Posted August 16, 2022 Share Posted August 16, 2022 Very neat, glad to see you found some cool stuff. Link to comment Share on other sites More sharing options...
aek Posted August 16, 2022 Author Share Posted August 16, 2022 @connorp thanks, fun trip. Some interesting micros in these rocks. I have a ton more to process from different layers. Link to comment Share on other sites More sharing options...
connorp Posted August 16, 2022 Share Posted August 16, 2022 1 minute ago, aek said: @connorp thanks, fun trip. Some interesting micros in these rocks. I have a ton more to process from different layers. Looking forward to seeing what you find. Were these scales from the fish layer on the top bench? Link to comment Share on other sites More sharing options...
aek Posted August 16, 2022 Author Share Posted August 16, 2022 58 minutes ago, connorp said: Looking forward to seeing what you find. Were these scales from the fish layer on the top bench? These came from a blue-ish gray layer deeper in the quarry. Not sure which layer unfortunately,,mid-lower. 1 Link to comment Share on other sites More sharing options...
aek Posted August 16, 2022 Author Share Posted August 16, 2022 @connorp after skimming through guidebook 87 these may have come from the bellula beds of the lower Rapid member. I'm judging this by looking at what I think might be a badly dissolved bellula brachiopod from the sample. 1 Link to comment Share on other sites More sharing options...
connorp Posted August 16, 2022 Share Posted August 16, 2022 @aek How are you breaking down these samples? Link to comment Share on other sites More sharing options...
aek Posted August 16, 2022 Author Share Posted August 16, 2022 56 minutes ago, connorp said: @aek How are you breaking down these samples? The rocks are broken down into pieces less than inch diameter then dissolved in dilute formic acid. The residues are sieved, rinsed and then examined under microscope. 1 Link to comment Share on other sites More sharing options...
connorp Posted August 16, 2022 Share Posted August 16, 2022 9 minutes ago, aek said: The rocks are broken down into pieces less than inch diameter then dissolved in dilute formic acid. The residues are sieved, rinsed and then examined under microscope. Are these from shales or limestones? Link to comment Share on other sites More sharing options...
aek Posted August 17, 2022 Author Share Posted August 17, 2022 4 hours ago, connorp said: Are these from shales or Limestone Link to comment Share on other sites More sharing options...
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